.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Binding a TreeView to a collection of objects

Posted By:      Posted Date: October 04, 2010    Points: 0   Category :WPF


I want to achieve this:


through data binding. That is, I've got this collection of objects of the same class (currently stored in a ArrayList), and I want to display them in a treeview, so that when you expand them you can see the values of their attributes.

Is it possible to do it via DataBinding?





View Complete Post

More Related Resource Links

WPF Treeview - Binding to a collection with different depths, and styling differently


Apologies for the long post -- Read a few threads about this, but still find it hard to implement. Basically, I have a collection of objects, defined as:

public class LibData
  public string Name { get; set; }
  ObservableCollection<LibObject> _list;
  public ObservableCollection<LibObject> List { get { return _list; } }

  public LibData(string name, LibDataType type)
    this.Name = name;
    _list = new ObservableCollection<LibObject>();

Binding with objects using codebehind



How can I bind an object to a dropdown list or gridview ? I am writing an application where my code behind calls an instance  and bind the list to either dropdown or gridview.

For example:

.aspx page:  default.aspx

<asp:dropdownlist  id="dd1"   runat="server" />



Code Behind:  default.VB

Partial Class Services_Default

    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As   System.EventArgs) Handles Me.Load

      Dim objlist As New services()

         Dd1.datasource = objlist.GetServices()

         Dd1.datatextfield = ?

         DD1.datatextfieldvalue = ?



End sub


End Class



APP_CODE :  Service.VB

    Public Class Services

    Public Function GetServices()

    Dim mylist As New Arraylist()

    Dim myconn As New SqlConne

Error 2908 while installing sql server 2005 management objects collection on Win 7

I have SQL Server native client 2005 installed on Win 7 64-bit machine. While installing SQL Server XMO 2005 it gives error 2908 and aborts installation. Any suggestion on the error?

Best way to create a collection of User Control objects?

Hi, I'm completely new to WPF (this week) and still grasping C# and .net as a whole. I've created a User Control which I need to add (and be able to remove) multiple instances of into a vertical list. I've so far stuck this in a Listbox although I might change this later when I'm more comfortable. So when I add the object I've created as a ListBox item it displays fine, but my issue is I need to able to delete items and add items and have those items auto update etc - so I'm guessing the WPF way to do things is to build a collection and have it bind to the list box. My question is this, what is the best type of collection to hold such objects. I've tried an Observablecollection so that I can monitor changes but when I give it a.Itemsource = Observablecollection it just presents me with a list of <Collection>. Anyone any ideas?

PS2007/MSSQL2008: Cannot install Microsoft SQL Server 2005 Management Objects Collection (sqlserver2

Hi folks, about 1,5 months ago I have set up a - 1 server - development environment for PS2007. I had installed all components on one Windows 2008 box. Everything worked fine, now I receive an error. •MOSS 2007 •SQL 2008 SP1 •MOPS 2007 SP2 I have done the additional installation for the cube building part according to this page http://technet.microsoft.com/en-us/library/dd285466(office.12).aspx Microsoft SQL Server Native Client (sqlncli.msi) Microsoft SQL Server 2005 Management Objects Collection (sqlserver2005_xmo.msi) Microsoft SQL Server 2005 Backwards Compatibility Components (SQLServer2005_BC.msi) Everything worked fine. Cubes were able to be built.. everything was good. In order to have Reports built I added SSRS 2008 Reporting Services Addin for MOSS (rsSharePoint_x64) Business Intelligence Development Studio (=Visual Studio for MSSQL) No CUs have been added to this box. NOW, Cube creation fails with the error: ULS LOG: [CBS] ProjectServerOlapCubeGenerator status: Analysis Services session failed with the following error: Failed to connect to the Analysis Services server <IPADDRESS>. Error: ActiveX component can't create object 08efbc13-299a-4abe-9021-c46887ca6915 Eventlog says: SSP Name: SharedServices1 PSError: CBSASConnectionFailure (17003) Cube build failed to connect to the Analysis Services server. Verify the data source connection i

Binding the sharepoint treeview to the quick launch data source

Is there any way i can bind the sharepoint treeview navigation to the same datasource as the quick launch bar? I'm trying to create a consistent navigation structure within a 4-site deep structure so the quick launch bar is rather clunky to use, but the treeview picks up on document libraries i don't want it to (i only want it to show subsites and pages).

Memory leak on binding to a WPF TreeView

We're having an issue with a TreeView hanging onto a viewmodel set that has been bound to it. We have a static treeview on the main window, and reset its ItemsSource to Nothing or a new viewmodel when new things need to be displayed. The problem seems to be that it's hanging onto the first item that it was bound to, even after the ItemsSource is set to nothing. The connection seems to be through some strange unknown binding that's in the EffectiveValues collection of the TreeView.   I was able to repro this in a test project, so I'll post the simplified code:   TreeView templates:   <Window.Resources> <HierarchicalDataTemplate DataType="{x:Type local:ParentViewModel}" ItemsSource="{Binding ChildVMs}"> <TextBlock Text="{Binding Name}"/> </HierarchicalDataTemplate> <DataTemplate DataType="{x:Type local:ChildViewModel}"> <TextBlock Text="{Binding Name}"/> </DataTemplate> </Window.Resources>   ViewModel definitions: (Shared Function to generate the itemssource for the treeview)   Public Class ParentViewModel Public Shared counter As Integer = 0 Public Shared Function GenerateViewModel() As List(Of ParentViewModel) Dim pvm As New ParentViewModel With {.Name = "Parent" & counter} ' Unique name pvm.ChildV

Problem binding business objects to custom user control properties

I have created a user control (supplierPicker) intended to allows a supplier database to be searched and a supplier selected. I want to be able to use this control in a number of other user controls, by binding the suppplierID property of the supplierPicker to a supplierID property in a business object, which is set as the datacontext of the parent user control. When I do this, and there is a supplierID specified in the business ofbject, the binding sets the supplierID in the supplierPicker control and it shows the correct supplier name in the textbox. However when the supplierID DependencyProperty is changed from within the supplierPicker the newly selected supplier name is shown in the TextBox, but the SupplierID does not propogate back to the business object. Other controls on the parent form work fine, so the binding to the business object seems to be ok. Any pointers as to what I'm doing wrong here would be grately appreciated.  This one has been driving me nuts for days! Snipped code for the supplier picker:         public partial class SupplierPicker : UserControl, INotifyPropertyChanged     {         public static DependencyProperty SupplierIDProperty;         public event PropertyChangedEventHandler PropertyChan

Binding to the TreeView control

My TreeView controls is rendering CheckBoxes on Leaf nodes. I want to bind to those nodes the ID of the underlying data item. I am not sure I can do this declaratively or if I need to hook up to the TreeNodeDataBound event. If the latter, how would I go about achieving this?   _hector

How to update a collection of objects in a view model?

I have been trying to design a form, which uses a view model that contains an object array. I want to set up this form so that when the submit button is clicked, all the members of the array are updated. Here is my code:The class definition of the array element:public partial class luSubject    {        public string Name { get; set; }        public bool FilledName { get; set; }public in MasterSubjectId{get;set;}        public luSubject()        {            FilledName = true;        }    }This is the view model I used for the form:public class TestModel    {        public luSubjects[] Subjects;        public int[] MS { get; set; }        public SelectList sl { get; set; }        public TestModel()        {            Subjects = new luSubjects[3];            for (int i = 0; i < Subjects.Length; i++)     &n

Binding DataGridView --- DataSet or Collection

This is my experiences. I can bind the DataGridView using DataSet and Collection. 1st expericence, If using DataSet, my DataGridView have an empty row at the last row (have to set AllowUserToAddRows Property to False). If using Collection, my DataGridView do not have empty row at the last row. 2nd experience, I know how to rebind the DataGridView using DataSet. But I dont know how to rebind the DataGridView using Collection. My collection as follow, private Collection<MasterAgentCompany> myDGV = new Collection<MasterAgentCompany>(); private BindingSource bindingSource = new BindingSource(); dgv1.DataSource = bindingSource; bindingSource.DataSource = myDGV; dgv1.Refresh(); /*THIS CODE IS OK ON 1ST TIME LOAD*/ /*IF I'M CALLING THIS CODE AGAIN, MY DATAGRIDVIEW NOT REFRESH THE NEW RECORD*/ I'm looking the right technique to rebind DataGridView using Collection I'm stuck. Really looking for help

WPF TreeView child nodes - collection is not a member of the first level nodes object



I was wondering if i could use a TreeView to display data from 2 separate collections where both collections are members of the same object. For example i have a view model that has 2 observable collections:



Each model has a property Brand which specifies the brand for each model. What i want to do is bind the first level to the Brands collection and the second level to the Models collection and specify a filter.

Thanks in advance.

Binding a treeview to a LinqToSQL class...


Hi all,

I have a LinQtoSQL class which encapsulates a table with the following relationship:

Id (int)
Parent ID(int)
Name (string)

Here, the parent ID is the id of another row int he same table. So, the table could look like:

1, null, grandpa
2,1, mom

What I want to do is the create a treeview that binds to the table so that it looks like this:


Also, I should be able to add or delete nodes/rows...

Any ideas on how to do this? Is this even possible without writing the code to do all the population and the edit etc?





Binding Listview to multiple Objects : ASP.net 3.5

  I am using Object as the data source to my Listview and trying to display data in a Hierarchical manner.  I am not able to figure out how to bind these objects to my listviews. Below pasted is the code. 
I am trying to place Listview inside another listview, inside another listview inorder to display data in a hierarchical manner.  Any help is very much appreciated.
The area with ???? is where i need help.
Thanks in advance
public class AutoElements 
       public class results_dataset
            public List<Claims_history> claimsHistory { get; set; }
            public int count {get; set;}
       public class Claims_history
            public List<Claim> claim { get; set; }
        public class Claim : ClaimType
            public string first_payment_date { get; set; }
Code to extract data from XML :
 public class ClaimsProcessing
      public AutoElements.results_dataset GetResultDataset()
             AutoElements.results_dataset  resultdatasets =
             (from b in query.Desc

Binding to an observable collection in a custom WPF control


Hi everyone,

I'll first explain a bit what I'm doing so that the code paste will make a bit more sense. I'm creating a circular menu control for Microsoft Surface (this question is far from Surface specific though, but otherwise this type of control wouldn't make sense :) ), it has some 'pieces' which are all buttons. I've created a 'Menu' control which contains the menu items, I made a custom control for these items (so I could add them to the menu within XAML), and I made a Button control which actually does the drawing of the path etc. I've done this in this specific way because the angle of the button's path will depend on the number of pieces within the menu. Anyway the above all works fine and dandy and I'm happy with the result. However now I'm trying to get all of this to work.

What I want to do is to use MVVM in my application and bind the MenuItems to a command in my ViewModel. So I have an AdminToolbox which is a view containing the menu and there's an AdminToolboxViewModel which is the ViewModel with the command and the items that I'd need to bind to my menu to create the menu items.

Some code pastes:



Binding a Treeview to an exception...

I'm not too familiar with Hierarchal DataTemplates yet, but here's what I want to do. 

I have a message box that has a small expander on the bottom with a treeview inside.  I want to hook the treeview up so that during runtime when an error occurs it can be caught, loaded into this treeview and displayed (including all the inner exceptions). 

How would I go about doing this? 

I'm fairly familiar with wpf and I can get everything into the message box correctly it's just the final display that I can't do yet. Also, I'm using VS 2010 Ultimate Beta 2.  Thanks in advance!!

Problem binding a collection to a view model on POST when manipulating the DOM with javascript.


Hi, i'm currently working on a strongly typed view and i'm binding a collection to a table like this:


for (int i = 0; i < Model.Cars.Count; i++)





<%= Html.Hidden(String.Format("Cars[{0}].Id", i),




<%= HtmlTextBox(String.Format("Cars[{0}].CarModel", i),



ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend